> For the complete documentation index, see [llms.txt](https://developer.magtek.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://developer.magtek.com/api-and-command-reference/dynafamily-programmers-manual/appendices/appendix-e-physical-button-dynaflex-only.md). # Appendix E: Physical Button (DynaFlex Only) Every DynaFlex device features a single physical button. On the DynaFlex II Go, this button is located on the left side of the device. For all other models, it is located on the bottom of the device near the USB port. Pressing and holding this button can activate additional functions on the device. To active a specific function, press and hold the button until a specific number of beeps are heard. The table below shows which functions can be activated. Beep counts that are not listed are not supported. ## Button Functions
Beep CountFunction

2

Power Off

Power the device off, The device will reboot if it is connected to USB.

3

WLAN Setup

WLAN devices only.

4

BLE Pairing

BLE devices only.

5

Demo

See Appendix C for more information.

6

Battery Level

Light the LEDs to indicate the current state of charge of the battery. The LEDs will light for 3 seconds then return to their original state.

The DynaFlex II Go has only green LEDs. Instead of lighting the first LED in amber, it will slowly flash the first LED. Instead of Red, the first LED will flash quickly.

## Battery Charge Status There is only one physical button on DynaFlex devices. Pressing and holding this button until the device beeps six times then releasing it causes the LEDs on the front of the device to display the current charge state of the battery. The LEDs will return to their previous state after three seconds. ## Battery Charged Example
Battery LevelTransactions and Firmware Update AllowedLED ColorLEDs On When Button is Pressed
100% - 90%YesGreen4 LEDs
89% - 70%YesGreen3 LEDs
69% - 50%YesGreen2 LEDs
49% - 20%YesAmber1 LED
19% - 6%YesRed1 LED
5% - 0%NoRed1 LED
The DynaFlex II Go has only green LEDs. Instead of lighting the first LED in amber, it will slowly flash the first LED. Instead of Red, the first LED will flash quickly --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation by asking a question. Perform an HTTP GET request on the following URL with the `ask` and `goal` query parameters: ``` GET https://developer.magtek.com/api-and-command-reference/dynafamily-programmers-manual/appendices/appendix-e-physical-button-dynaflex-only.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is what the user is ultimately trying to achieve, the reason they need the answer. Sharing it helps GitBook give you a better, more relevant answer. A goal is most helpful when it describes the outcome the user wants rather than restating the question. For example, with `ask=how do I create an API token`, a goal like `automate deployments from our CI pipeline` lets GitBook tailor the answer to that use case. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.